53 lines
2.1 KiB
TypeScript
53 lines
2.1 KiB
TypeScript
import * as plugins from './plugins.js';
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import { SmartdataCollection } from './classes.collection.js';
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import { SmartdataDb } from './classes.db.js';
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/**
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* Per-SmartdataDb collection cache.
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*
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* Historically this class keyed its cache by class name alone, which meant
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* the first SmartdataDb to request a collection of a given class name
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* "won" — every subsequent call from a different SmartdataDb instance
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* received the cached collection bound to the first db. That silently
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* broke multi-tenant SaaS apps (one db per tenant), tests instantiating
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* multiple SmartdataDbs in sequence, and any in-process db cluster switch.
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*
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* The cache is now keyed by `(SmartdataDb instance, className)` using a
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* WeakMap of db → Map<className, SmartdataCollection>. Entries are GC'd
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* with their parent db automatically.
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*/
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export class CollectionFactory {
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private perDbCollections: WeakMap<SmartdataDb, Map<string, SmartdataCollection<any>>> = new WeakMap();
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public getCollection = (nameArg: string, dbArg: SmartdataDb): SmartdataCollection<any> => {
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if (!(dbArg instanceof SmartdataDb)) {
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// Preserve the historical behavior of returning undefined-ish for
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// non-db args. All in-repo callers already guard on instanceof
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// before using the result (see classes.collection.ts).
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return undefined as unknown as SmartdataCollection<any>;
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}
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let dbMap = this.perDbCollections.get(dbArg);
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if (!dbMap) {
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dbMap = new Map();
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this.perDbCollections.set(dbArg, dbMap);
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}
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let coll = dbMap.get(nameArg);
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if (!coll) {
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coll = new SmartdataCollection(nameArg, dbArg);
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dbMap.set(nameArg, coll);
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}
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return coll;
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};
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/**
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* @deprecated Internal back-compat shim. The previous field was a public
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* Record<className, SmartdataCollection> but was not part of the
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* documented public API. WeakMap is not iterable, so this getter returns
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* an empty object — anyone actually relying on the old shape would get
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* clean nothing rather than wrong-db data. Will be removed in 8.0.
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*/
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public get collections(): { [key: string]: SmartdataCollection<any> } {
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return {};
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}
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}
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